Adjustable book-support and copy-spacer.



No. 879,770. PATENTED FEB. 18, 1908.

' A P. H. HOFFMANN.

ADJUSTABLE BOOK SUPPORT ANO OOPY SPACER.

APPLI'OATIONr FILED 1330.22, 1904. 'BENEWBD JULY'lO. 1907.

\2 AWMUAHA/f Stk-yann) WEEB PATENT @FETCH no. eff-9,770.

Be it known that l, FRANK H. lloiriiANN, a citizen of the United States, residing in the i city and county of Dubuque and State of the pivot pinJ. The pivot pin l may beasetscrew; and7 when nedessary, by tightening' the set-screw the parts H and Ji may be inade to forni a rigid straight standard.

To the frame, at the base, on each side., is vpivoted a brace K which is provided with a slot L in which the lower end of the brace Gr is adjustablyfattached by ajset screw 7c. this manner 'the standard G may be set at any place along the slot L in the,I brace K-and inthis niannervary the angle of the frame to Iowa, have invented certain nrw and useiiul lin roveineiits in Adjustable Book-Supports an( Copy-Spacers; and 'l `do `hereby declare the following to be a full, clear, and exact description of the invention, -which will enable others skilled in the art to which it appertains to make and use the saine.

My invention relates to book supports with special reference to those for holding 4books from which the contents are -to be copied;

` and the object is not onlyv to providean ad- 'the base.

justable support adapted to vary the angle at which the book is to be sustained, butalso to provide an adjustable spacer er guide to vindicate the line to be copied.

The following,- specification will describe 4in detail the Inode of constructing and manner of operating the saine when taken in con* nection with the drawings accompanying the sanieand forming a part hereof.

Figure 1 is 'a perspective view of the device with abook thereon, when the "legs or standards are set at about right angles to the desk on which it rests. Y

tive view of the device with the fbook ireniovedvand in a position to sustain the book at a slight angie to the desk. Figz is 'a longitudinal section of the vtubeand barconstif spacer or guide. l upper "side o i the upper plate of the device. Fig. 5 is a plan view oi the adjustable stand# indicatinpr how the standards are attached to and sustain the frame. ol the angle plate D showing theinode of ad justably attaching thespacerin the plate.

'Like letters of .reference denote corresponding parts in each of theiigures.

Referring, to the drawings, A represents the device and B the base bar or plate, which consists of an angleiron against which the book C rests when the device is in position and ready for use. At. the top of this device is a har or plate D preferably of angle iron. These two plates B and D are attached at their ends to two angle bars E the whole At the juncture of the blars E with .the plate D, at each end,'there is pivoted a standard or legl G. These standforming a frame.

Fig. 4 isa plairview of the `'t FRANK H. HOFFMANN, OF DUBUQUE, IOWA.

"LDJUSTABLE BOOK-SUPPORT AND COPY-SPACER.

Specification of Letters Patel/it.

To all whom it may concern: j ards G each'consist of two members ll and 71. j' which are pivotcd together bv a pivot pin l. The part z. is also pivoted `tdjthe plate D by Patented Feb. 18, 1908.

inclination tiled December ZZ. 1904.-. Serial No. 237.900. Renewed July 19. 1907. Serial No. 384.611.

For the purpose of ii'i'dicatingy the line desired to be copied, there is provided an adjustable spacer M which consists preferrably ofa circular-bar Nprovided with notches 0, to the Alower end ot 'which is attached :a horizontalv bar or spacer P. In `order to provide means whereby the spacer can be adjusted to the 'li/ne desired forcopyin'g, the l"bar N is inserted 'through a tube Q, which ftube is provided 'with fa shoulder R, said shoulder jhavingia hole therethrough opening into'the'tube.' The inside ofthe opening Fig. 2 is 'a perspecin the-shoulder 4is screw-threaded andinto it is screwed a tube S having-ahead s integral therewith through which isan opening. In ythis tube is inserte dapin'dfhavinga shoulderp onitsinner end. This pin'issurroundedbya' tilting the means for adjustably holding the spring n which bears againstthe heads and e shoulder p. The pin d is .adapted to engage the notches Aiii-the rod N andthe spring servesjto hold lthe 'pin in engagement ard -aiid bottoni brace removed. Fig. 6 with the netchesOand exert a tension on shows the standard and` brace lattached to fthebar N. the vframe and part of the framecut-away The notches 'O in the 1bar N are formed the same distance yapart on the bar as the Fig. 7 is a'rear view space betweenthe lines to be co ied; and if it be necessary'tc copy a book iaving lines dieren't in the spaces between them, then another bar N having notches of thedistance a art to correspond to the spaces between t'ie lines, is inserted in the tube Q so that when the bar N is drawn down one notch, the spacer will be brought down with itjust the space between the lines.

For the purpose of adjusting the s acer to adapt it to space upon books of thickness and Width, there is preferably cast with the tube Q a shoulder T and p Upon the pin tis pivoted an arm U. This arm f U is pivoted to a block or standard W, which standard is removably secured in a recess X in the bar or plate l). When the book is exceedinglyl thick, then there may be two ormore of these arms U, and when the book is of great width when opened, there may bev several of these recesses X or a slot Z in the bar D.

The convenient mode for using my device is substantially as follows: The angle to which the book is desired to be set is first determined. If it be an angle of about 4:50 as shown in Fig. l, the standards G are each adjusted by turning the .plate 71 backward until 'it rests against the under surface of the side iece or bar E, then the art H of the stan ard G is moved along in the slot L until the proper angle for the book rest is obtained, and the set screw lc is brought into action. and

holds the standard G firmly attached to the brace K. If it is desired to have the rest ata slight angle to the table on which the `deviee is used, the member h of the standard Gr is brought away from the side pieces E and set in nearly a perlpendicular position, with the lower end, wnic 1 is pivo ted to the member H, resting upon the table and the member H v ina line parallel with the brace K and the set screw 7c is tightened.

It will be observed that when the rest is in the position shown in Fig. 2 it will set irmly on the table -as the members H serve as standards or legs and hold the book rest firmly and these legs cannot move in either direction because the set screw will hold the member H rigidly upon the brace K. It will also be observed that when the rest is in the position shown in Fig. l it will also set firmly upon the table as the side pieces Eform a bearing along the whole length of the member h of the standard Gand as the side pieces E are of angle iron they will engage upon two sides of the member h. seen that if it is desired to lower the bookto some intermediate anglel between that shown in Figs. 1 and 2 then the standards G will be moved further along towards the outer ends of the slots in` braces K and still the same rigidity will be maintained .at whateverI an e the rest is set.

desired, then the spacer P is adjusted by setting the standard "W at the desired place along in the platel) to adapt it to the width of the book when o en, and the arm U is brought tov substantially a right angle with t' the standard W or otherwise as is determined the page is copied, the operator'grasps the It will also be 1 lgVhen the book is adjusted to the position 5 eremo s acer l) a'nd forces the bar N back throu h tie tube. This can-be readily done as t e notches O in the rod N are curved and the end of the pin d is also curved. lf it is desired to copy a page having lines of different distances apart, then there is inserted in the .tube Q a bar N having notches O at the required distance apart. j

It will be observed that this book rest may be adapted to be set at any desired angle and the spacer also set to copy pages having lines ol dill'erent spaces between. them, and alsov standards pivoted to the trame, each standard consisting of two members pivoted together, and braces secured to the frame, the standards being adjustably attached to said braces.l

2. ln a device of the character described,

a frame, braces each provided with a slot and Aattached to the op osite sides of the frame,y

sustaining standarrs pivoted to the frame, each standard, censistin'g of two members pivoted together, and said-standards adjustably aitached to said braces by means ing the slots in the braces.

3. ln a device of the character described,

a frame rovided with side pieces of angular ensesf shape, a )race secured to cach side piece, and

standards each consisting of two members pivoted together and attached to each side piece and adjustably attached tothe braces.

Li. In a device of the character described, a frame tor supporting a book, braces secured to the frame, sustaining standards each con sist-ing of two members pivoted together and secured to the Aframe and adjustably attached to the braces, and a spacer for indicating the line to be copied. i

5. In a device of the character described,

a frame, standards pivoted to the -frame and f each formed of two members pivoted to gather, braces provided'with slots secured to the trame, set screws adapted to engage the slots in the braces and adjustabiy secure the standards to the braces, a spacer tached to the traine, and means for pemnit- M. M. Canv, M. M. Kranten. 

